condition mean min max ZT0-3 3.55415 3.11167 3.99663 ZT4-7 3.9518 3.9518 3.9518 ZT8-11 10.46725 10.46725 10.46725 ZT12-15 0 0 0 ZT16-19 9.498795000000001 9.498795000000001 9.498795000000001 ZT20-23 8.010335 8.010335 8.010335